In an interview with Showtime's Jim Gray, Floyd Mayweather said he's changed his mind about a rematch with Manny Pacquiao and called him a "coward" and a "sore loser," according to Lance Pugmire of the Los Angeles Times.

Mayweather defeated Pacquiao by unanimous decision in their long-awaited May 2 fight in Las Vegas. He confirmed he sent a text to ESPN's Stephen A. Smith earlier this week that said he would be willing to give Pacquiao a rematch.

"Did I text Stephen A. Smith and say I will fight him again? Yeah, but I change my mind," said Mayweather. "At this particular time, no, because he's a sore loser and he's a coward ... If you lost, accept the loss and say, 'Mayweather, you were the better fighter.'"

After the fight, Pacquiao revealed that he was dealing with a shoulder injury. He will likely be out of action for the next 9-12 months after he has surgery to repair a tear in his right rotator cuff, but Top Rank promoter Bob Arum had said Pacquiao would be up for a rematch with Mayweather next year.

"Excuses, excuses, excuses," said Mayweather. "I'm not going to buy into the bull---- ... and I don’t want the public to buy into the bull----. He lost. He knows he lost. I lost a lot of respect for him after all of this."